Ptychographic nanoscale imaging of the magnetoelectric coupling in freestanding BiFeO$_3$
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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866913408464453632 |
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| author | Butcher, Tim A. Phillips, Nicholas W. Chiu, Chun-Chien Wei, Chia-Chun Ho, Sheng-Zhu Chen, Yi-Chun Fröjdh, Erik Baruffaldi, Filippo Carulla, Maria Zhang, Jiaguo Bergamaschi, Anna Vaz, Carlos A. F. Kleibert, Armin Finizio, Simone Yang, Jan-Chi Huang, Shih-Wen Raabe, Jörg |
| author_facet | Butcher, Tim A. Phillips, Nicholas W. Chiu, Chun-Chien Wei, Chia-Chun Ho, Sheng-Zhu Chen, Yi-Chun Fröjdh, Erik Baruffaldi, Filippo Carulla, Maria Zhang, Jiaguo Bergamaschi, Anna Vaz, Carlos A. F. Kleibert, Armin Finizio, Simone Yang, Jan-Chi Huang, Shih-Wen Raabe, Jörg |
| contents | Understanding the magnetic and ferroelectric ordering of magnetoelectric multiferroic materials at the nanoscale necessitates a versatile imaging method with high spatial resolution. Here, soft X-ray ptychography is employed to simultaneously image the ferroelectric and antiferromagnetic domains in an 80 nm thin freestanding film of the room-temperature multiferroic BiFeO$_3$ (BFO). The antiferromagnetic spin cycloid of period 64 nm is resolved by reconstructing the corresponding resonant elastic X-ray scattering in real space and visualized together with mosaic-like ferroelectric domains in a linear dichroic contrast image at the Fe L$_3$ edge. The measurements reveal a near perfect coupling between the antiferromagnetic and ferroelectric ordering by which the propagation direction of the spin cycloid is locked orthogonally to the ferroelectric polarization. In addition, the study evinces both a preference for in-plane propagation of the spin cycloid and changes of the ferroelectric polarization by 71° between multiferroic domains in the epitaxial strain-free, freestanding BFO film. The results provide a direct visualization of the strong magnetoelectric coupling in BFO and of its fine multiferroic domain structure, emphasizing the potential of ptychographic imaging for the study of multiferroics and non-collinear magnetic materials with soft X-rays. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_13465 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Ptychographic nanoscale imaging of the magnetoelectric coupling in freestanding BiFeO$_3$ Butcher, Tim A. Phillips, Nicholas W. Chiu, Chun-Chien Wei, Chia-Chun Ho, Sheng-Zhu Chen, Yi-Chun Fröjdh, Erik Baruffaldi, Filippo Carulla, Maria Zhang, Jiaguo Bergamaschi, Anna Vaz, Carlos A. F. Kleibert, Armin Finizio, Simone Yang, Jan-Chi Huang, Shih-Wen Raabe, Jörg Materials Science Mesoscale and Nanoscale Physics Understanding the magnetic and ferroelectric ordering of magnetoelectric multiferroic materials at the nanoscale necessitates a versatile imaging method with high spatial resolution. Here, soft X-ray ptychography is employed to simultaneously image the ferroelectric and antiferromagnetic domains in an 80 nm thin freestanding film of the room-temperature multiferroic BiFeO$_3$ (BFO). The antiferromagnetic spin cycloid of period 64 nm is resolved by reconstructing the corresponding resonant elastic X-ray scattering in real space and visualized together with mosaic-like ferroelectric domains in a linear dichroic contrast image at the Fe L$_3$ edge. The measurements reveal a near perfect coupling between the antiferromagnetic and ferroelectric ordering by which the propagation direction of the spin cycloid is locked orthogonally to the ferroelectric polarization. In addition, the study evinces both a preference for in-plane propagation of the spin cycloid and changes of the ferroelectric polarization by 71° between multiferroic domains in the epitaxial strain-free, freestanding BFO film. The results provide a direct visualization of the strong magnetoelectric coupling in BFO and of its fine multiferroic domain structure, emphasizing the potential of ptychographic imaging for the study of multiferroics and non-collinear magnetic materials with soft X-rays. |
| title | Ptychographic nanoscale imaging of the magnetoelectric coupling in freestanding BiFeO$_3$ |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2308.13465 |